70
Appendix
Troubleshooting
Before you assume that this product is malfunctioning,
check the following:
Symptom
Check item
Page
Cannot turn on
power.
Is the built-in battery charged?
P.44
Do you press and hold the
power key?
P.46
Cannot charge the
battery.
Is the AC adapter securely
plugged into an outlet?
P.44
Battery usage
time is short.
Do you use this product more
in the places without signal
reception (out of service)?
-
Is the built-in battery running out?
P.26
Cannot operate
touch panel as
intended.
Are you operating with gloved
hands?
P.48
Make sure you are not operating
with your fi nger tip or there is no
foreign object in the middle of the
panel.
P.48
Cannot operate
the keys/touch
panel.
Is the screen lock set?
-
Turn off the power and turn it on
again.
P.46
Screen response
is slow when you
tap on the screen/
press the keys.
Screen response may slow down
when a large amount of data is
stored in this product or being
transmitted between product and
a microSD memory card.
-
"No SIM card" is
displayed.
Is an au Nano IC Card (LTE)
inserted?
P.42
Symptom
Check item
Page
Cannot make
calls.
Is an au Nano IC Card (LTE)
inserted?
P.42
Did you enter the wrong phone
number?
(Did you enter the phone number
starting with an area code?)
P.60
Is "Airplane mode" set?
P.66
Is "Network mode" wrong?
-
Cannot receive
calls.
Is reception good enough?
P.53
Are you out of service area?
P.53
Is "Airplane mode" set?
P.66
Is "Network mode" wrong?
-
Is Call forwarding service set?
P.66
Display is dark.
Is "Brightness" set to dark?
P.67
Cannot hear the
other party.
Is the earpiece volume too low?
P.60
Do you bring earpiece close to
your ear? Put the earpiece close
to your ear hold.
P.39
Cannot use NFC/
Osaifu-Keitai
®
.
Has the battery run out?
P.44
Is "NFC/Osaifu-Keitai lock" set?
-
Do you hold this product so that
the
mark area is placed over
the reader?
P.39
Cannot recognize
a microSD
memory card.
Is a microSD memory card
inserted properly?
P.64
Is the microSD memory card
unmounted?
P.65
If the symptom does not improve after checking the above
items, contact the below au website or au customer
support.
http://www.au.kddi.com/support/mobile/trouble/repair